body{
    background-image: url("http://39.105.120.215/static/image/common/RBG_BEIJING222.gif");
    background-repeat: no-repeat;
    width: 100%;
    height: 100%;
    min-height: 640px;
    min-width: 480px;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
}
#test{
    margin: 0 auto;
    background-color: white;
    width: 80%;
    height: 1080px;
    text-align: center;
}
#heili{
    font-size: xx-large;
    color: black;
}
#coming{
    font-size: x-large;
}